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提出一种基于有限元计算的边坡三维滑裂面搜索的方法,根据有限元计算的应力结果,计算可能滑裂面的安全系数,然后用遗传算法搜索出最危险滑裂面,并得出相应的安全系数作为边坡的安全度评价指标。该方法的优越性是只需进行一次有限元计算,不需要假定滑裂面,可以用于具有复杂地貌和地质构造的三维边坡。通过算例,验证该方法的可行性和程序的正确性,以大岗山水电站库区边坡工程实例验证该方法的实用性。
A method based on finite element calculation is proposed to search for the three-dimensional sliding surface of slope. According to the stress results calculated by finite element method, the safety factor of the possible sliding surface is calculated, and then the most dangerous slip surface is found by genetic algorithm. The corresponding safety factor is used as safety evaluation index of slope. The advantage of this method is that it needs only one finite element calculation and does not need to assume the sliding surface, so it can be applied to the three-dimensional slope with complex landform and geological structure. The feasibility of the method and the correctness of the program are verified by examples. The practicality of this method is validated by the engineering example of Slope of Dagangshan Hydropower Station.